Some Mobile Post Office cancels

Here are a few mobile post office cancels starting with a "MOBILE POST OFFICE / A" cancel used under Shepton Mallet in 1954 at the Mid-Somerset Agricultural Show,

The cancel used at the Frome Agricultural Show in 1957 was "MOBILE POST OFFICE 2 / B", as shown below on an uprated 46th Parliamentary Conference airmail to the USA.

The cancel used under Bristol in 1958  at the Royal Agricultural Show was "MOBILE POST OFFICE 2 / A", as shown below.

The cancel was used again in April 1960 at the Taunton Jumping Festival at Milverton, with a typed large unattributed registration etiquette.

In May 1962 a "MOBILE POST OFFICE 2 / B" cancel was used at the Bath & West Show under Taunton.

And finally the "MOBILE POST OFFICE No.3 / B" cancel was used in September 1960 at the Mid-Somerset Agricultural Show, and the "MOBILE POST OFFICE 1 / A" cancel was used in June 1966 at the Bath & West Show, both under Shepton Mallet.